Definition of flying fox in English:

noun

The Megachiroptera includes the so-called fruitbats and flying foxes of the tropical forests of India, Africa, Asia, and Australia.

All flying foxes are fruit bats, but not all fruit bats are flying foxes.

The Megachiroptera, or fruitbats and flying foxes, navigate largely by sight and have large, forward-facing eyes that can see in very dim light, as you can see on the skeleton of a fruitbat pictured above.